Aidez moi s'il vous plait je dois écrire une lettre d'excuse (pourquoi jetait en retard en cour inventer ce que vous voulez) en anglais.

Dear teacher. Sorry for being late this morning! Our car got stuck in the trafic.

I really do apology for being late the (écrit la date ici). Indeed, I missed my bus that morning and I had trouble to commute at school. I hope you understand my situation. It won't happen again.